Pile wire



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; m. PiCKAR D PILE WIRE Filed March 9, 1925 Patented July 20, 1926.

UNITED srarss insane rarsnr arms.

OLIVER J. .PICKARD, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 JOSEPH PICKARDS SONS CO., A PARTNERSHIP GOMPOSED OF OLIVER J. PICKABD, FRED PICKARD, AND FEED A. ATKINSON, PHILADELPHIA, PENNSYLVANIA.

FILE WIRE.

Application filed March 9, 1825. Serial No. 14,283.

The invention relates to pile wires, and the principal object of the invention is to provide a pile wire having a cutting blade which will retain its etliciency over a longer period of use than the blades of pile wires heretd fore commonly used.

A more specific object of the invention is to provide a cutting blade whose effective length materially exceeds that of the blades of wires as manufactured prior to my invention.

The invention further resides in certain novel details of construction as hereinafter more fully described and as illustrated in the attached drawings, in which:

Figure 1 is a side view of the bladed end of a pile wire made in accordance with my invention;

Fig. 2 is a view in perspective of one end of a pile wire illustrating a modification of he invention;

Fig. 3 is a view in perspective of a separately formed cutting blade adapted for use with the pile wire illustrated in Fig. 2, and

4 is a longitudinal vertical section through the assembled pile wire whose cornponent parts are illustrated in Figs. 2 and 3.

Prior to my invention. it has been customary to provide pile wires with a cutting edge rising on an incline from the top edge of the pile wire, and while the disadvantages of this form of blade'have been recognized and much time and energy spent in improving it with a view to eliminating the defects, there has, so far as I am aware, been no radical departure from this general form of blade.

The principal defect of this form of cut ting edge resides in the fact that only a comparatively short length of the cutting edge is utilized, this being at the point where the blade merges into the upper edge of the pile wire. The result has been that the blade quickly became dull and required constant re-sharpening.

I have discovered that by forming the blade section so that the cutting edge entends parallel to the longitudinal axis of the wire and preferably slightly elevated above the upper edge, the blade will maintain its sharpness over materially longer periods of time than heretofore, the reason for this being that with the parallel edge the effective length is materially increased and the'cutting action not concentrated at one ppirlit, as with the heretofore usual form of are.

With reference to the drawings, I have illustrated in Fig. 1 a pile wire made in accordance with my invention in which the blade portion 1 is an integral part of the wire 2. In this instance, the cutting edge extends from the point designated by the reference numeral 3 to the point designated by the reference numeral l, the elevated inclined portion 5 of the cutting edge being provided for purposes of safety and to in sure a cutting of the pile when the portion 6 of the blade which parallels the longitudinal axis of the wire 2 may have become too dull to properly function. It will be understood, however, that the inclined portion 5 of the blade is not essential and may, if desired, be eliminated.

I have found that in operation when the wire 2 is withdrawn from between the piles, there is a tendency for the elevated cutting edge to draw the piles from the normal perpendicular position shown at 7 to the inclined position shown at 8, this tendency for the pile loops to be inclined also tending to draw the top of the loop down tightly upon the blade 6. The blade 6, as will be noted, is comparatively long, and by reason of its parallel arrangement, every part of it is potentially active. If, therefore, the forward edge of thi blade becomes dulled in use, the other portions of the blade are still capable of cutting the pile, and the wire may be used continuously until the entire length of the blade has become so dull as to be incapable of cutting the pile. In this event, where the elevated end portion 5 is provided, the latter will function to sever the piles, and this will provide an indication to the 0perators of the loom that the parallel edge 6 of the wire has become dulled and should be re-sharpened.

In Figs. 2 to 4, inclusive, I have illustrated another form of wire within the scope of the invention. In this case, the blade 9 is formed independently of the wire 10, the latter being provided with a slot 11 adapted to receive the blade 9, as shown in Fig. To secure the blade in the wire, I prefer to employ solder at the shaded parts indicated by the reference numerals 12 and 13, the application of heat for sweating this joint havingno efiect' upon the temper of the blade. the extended cutting edge 6 paralleling the longitudinal am's of the pile wire and slightly elevated above: the upper edge and also the elevated end portion 5 of the blade which as previously described constitutes a safety element positively insuring the cutting of the pile.

I claim 1. A pile wire comprising a cutting edge substantially parallel to the longitudinal In this instance, the blade comprises axis and elevated above the upper edge of the pile Wire.

2. A pile- Wire comprising a cutting edge substantially paralleling the longitudinal axisof the Wire.

3. A pile Wire comprising an extended cutting edge substantially parallel to the longitudinal axis of the pile wire.

t.v A pile Wire comprising a. cutting edge substantially parallel to the longitudinal axis and elevated above the top edge of the pile wire and terminating at its outer end in an upwardly inclined section.

OLIVER J. PlCKARD. 

